(1) Found on 11B Kansas City tag but tag is suspect
for several reasons. Also found on Baltimore trim broadcast sheets so, while
the code appears to be valid, its appearance on a trim tag is probably not.

(2) Standard transmission on all SS396 but so
far only Kansas City tags have surfaced with this code. Atlanta is known
to use no code when no optional transmission is ordered. Other plants are
not known.

(3) The letter "K" has only been found
on Framingham tags and is assumed to be air conditioning since no Framingham
tags to date have been discovered with the letter "E" in group
2.

(4) Unknown, found on an 11D Kansas City Malibu
convertible body plate.

(5) Debate whether this does indicate the optional
M21 close ratio 4-speed. It has been found on numerous trim tags with known
M21 option and the "L" code is not present.
>> Update, November 2011: One July 1967 L78 Chevelle from Kansas City shows "L"
on the trim tag and various paperwork with the car clearly indicates an
M21 4-speed. It's possible the letter "Q" was dropped late in
the 1967 model year but there are no facts to support either theory.

Group 3 - preceded by the number "3"

B ~ Rear window defogger [RPO C50]

Group 4 - preceded by the number "4"

F ~ Operating Convenience Group (1)

H ~ Unknown (found on Baltimore trim sheet)

N ~ Found on fake tag (2)

(1) Not verified with RPO code, found on several
Atlanta and Kansas City body plates.(2) Found on Kansas City 04A and 06D body plates. Suspect these
body plates are reproduction. There was a guy making the fake tags that
always put 4N or 4K (L78) on his fake Chevelle tags until someone outed
a fake car and the news got back to the trim tag guy that those codes were
not used on Chevelles, so he stopped doing that to his fake tags.